Trolley-base.



' No. 762,831. PATENTED JUNE 14, 1904:

- P. n. MILLOY.

TROLLEY BASE. APPLICATION FILED 00T.27. 1902. RENEWED MAR. 29, 1904,

N0 MODEL.

Mimi-Gui:

UNITED STATES Patented June 14, 1 904.

PATENT OFFICE."

PETER D. MILLOY, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TOWASHINGTON L. ALBEE, OF BUFFALO, NEW YORK.

. TROLLEY-BASE'.

SPECIFICATION forming part of Letters Patent No. 762,831, dated June 14,1904. Application filed October 27, 1902. Renewed March 29, 1904. SerialNo. 200,639. (No model.) 7

To all whom it may concern.-

Be it known that 1, PETER D. MILLOY, of Buffalo, in the county of Erie,in the State of New York, have invented new and useful Improvements inTrolley-Bases, of which the following, taken in connection with theaccompanying drawings, is a full, clear and exact description.

My invention relates to improvements in trolley-supports, and refersmore particularly to the base and specific means for attaching thetrolley-pole thereto. I

There are two important functions in the successful operation of atrolley-pole. First, it is necessary to mount the pole so as to revolvehorizontally, so that the position of the pole may be reversed when thedirection of motion of the car is reversed, and, second, it is alsonecessary to provide suitable take-up means for holding the trolley inengagement with the line-wire during the transit of the car over theroute in which the height of the linewire at diiferent points variesconsiderably.

My invention involves these two functions,-

the primary object of which is to distribute the strain incidental tothe engagement of the trolley withthe line-wire as counteracting thetension of the springs which tend to elevate the trolley-pole.

It is obvious that when the trolley-pole is pivotally mounted in avertical plane coincident with the axis of revolution of the revolvingsection of the trolley-base the strain is practically borne by only asmall portion of the bearings for said revolving section, whichtherefore tends to wear the bearings unequally and at the same timelocalizes the strain upon the axial bearings. This is particularly truewhere only central bearings are employed, the strain being proportionateto the distance of the bearings from the axis.

In carrying out. the primary object of my invention 1 not only provide acentral bearing and a broad concentric hearing, but also position thefulcrum of the lever which supports the trolley-pole in such manner thatthe strain is broughtmore nearly in a direct axial line, or rather moredirectly over the axis of the central hearing, so that the strain isaxially instead of laterally. 5

A more specific object of my invention is to mount the revoluble sectionof the base in such manner that it may be readily removed, the outerconcentric bearings consisting of rollers movable in an annular grooveor raceway, which annular groove serves as a retainer for the rollerswhen the revoluble section is removed without the employment ofjournalbearings for said rollers.

To this end the invention consists in the combination, construction, andarrangement of the parts of a trolley-support, as hereinafter fullydescribed, and pointed out in the claims.

Referring to the drawings, Figures 1 and 2 are respectively top, plan,and side elevation of my invention, the trolley-pole being removed inFig. l and a portion of the pivotal bearing for the pole-supportinglever being shown in section. Fig. 3 is a sectional view taken on line 33, Fig. 2, the pole-supporting lever being supported in its normalelevated position.

Similar reference characters indicate corresponding parts in all theviews.

As'seen in the drawings, this invention con- 7 5 sists, essentially, ofa fixed base-section 1, a revolving base-section 2, a trolley-supportinglever 3, and suitable springs, as 4:, for automatically operating thelever in one direction.

The base 1 is adapted to be secured to the top of a car and ispreferably formed of cast .metal, such as malleable iron, and isprovided with a central boss 5, having a vertical socket 6, surroundingwhich at a considerable distance therefrom are separated inner and outerflanges 7 and 8 for forming an annular groove 9.

The central boss 5 is usually of considerable height to aiford a longbearing for the revolving section 2, presently described. 9

I The annular groove 9 serves as a race for roller-bearings 10, and theflanges 7 and 8 retain said rollers in their upright positions and arepreferably of less height than the diameter of the rollers, so as toavoid friction with the revolving section 2. I preferably provide thisbase with radially-projecting feet 11, having apertures 12 to receivesuitable clampingbolts, (not shown.) but which are employed to securethe fixed base to the top of the car in any desired manner.

The revolving base-section 2 is provided with a circular body ofslightly greater diameter than that of the annular flange 8 and isusually formed of malleable iron or similar tenacious metal and providedwith an annular flange 13, surrounding the outer flange 8 and dependingbeneath its upper edge for practically inclosing the annular groove 9and roller-bearing 10 and preventing the entrance of dust and otherforeign substance. This revolving section is provided with asubstantially flat annular bearing-face 14, resting upon the rollers 10,and is also formed with a central boss or hub 15, depending from andformed of less diameter than the socket 6, for forming an annularchamber, in which are inserted suitable upright roller-bearings 16 toreceive any lateral strain of the revolving section and to reduce thefriction to a minimum.

It is desirable in this class of devices to have the base as low down aspossible,-so that the trolley-arm may be depressed to a substantiallyhorizontal position close to the car in passing under low bridges andinto their stalls, or when the car is moved into other cramped places,and I therefore arrange the outer edge of the circular body of the outersection as close to the fixed base as practicable; but in order toobtain the long bearing at the center I usually elevate or arch thecenter portion of the revolving section, from which the boss depends.

It is apparent from the foregoing description that I have provided twoconcentric bearings, one at the center and the other of much greaterdiameter, and that by this construction and arrangement the revolvingsection is held in operative position without the aid of a centralclamping or pivotal bolt and is capable of resisting considerable axialstrain and any lateral strain which may be incidentally produced.

Projecting rearwardly from and formed integral with the revolvingsection 2 is a bracket 17, having diverging arms 18 formed withlengthwise substantially parallel apertures 19 for receiving adjustableanchors 20, the purpose ofwhich will be presently described.

The opposite or front side of the revolving section 2 is formed with aforwardly and upwardly projecting arm 21, having a hollow bearing 22located a considerable distance in front of the vertical axis of therevolving section and in a plane above the upper surface of therevolving section 2, and receives a pivotal member 23, upon which thelever 3 is mounted.

The pivotal member 23 projects beyond the opposite ends of the bearing22, and the lever 3 is provided with a bifurcated lower extremity forforming arms 24, which are mounted directly upon the opposite projectingends of the pivotal member 23, said projecting ends forming the fulcrumof the lever.

The arms 2 1 of the lever 3 extend a short distance below the fulcrumand are provided with pivotal bolts 25, to which are pivoted oppositerock-arms or anchors 26. I have thus provided two sets of anchors, oneset at each side of the base-sections, and the anchors of each set aredisposed in front and at the rear of the axis of revolution of thesection 2. The anchors are located at the rear of the axis of therevoluble head 2 and are each provided at one end with a pair ofhook-shaped extremities 27, while their opposite ends are threaded andpassed through the apertures 19 and engaged by suitable adjusting-nuts28, the hooks 27 serving to receive corresponding ends of the springs4:, while the opposite ends of said springs are attached to hooks'29,provided upon the rocking anchors 26.

The lever 3 is provided with an upward cylindrical extension 30, whichis preferably split longitudinally and is formed with a socket 31 ofangular cross-section for receiving a trolley-pole 32 of similarcross-sectional form, which trolley-pole is held in operative positionby the opposite jaws of the tubular extension and suitableclamping-bolts 33, these latter bolts being passed through ears providedupon the opposite jaws of the tubular extension 30.

It is apparent from the foregoing description that by disposing thefulcrum of the lever 3 at the front of the axis of the revolution of thehead of the section 2 the strain incidental to the rearward and downwardmovement of the trolley-pole as it engages the linewire is more nearlydirectly over the center of axis of revolution, and therefore avoids toa considerable extent lateral strain upon the central bearing and at thesame time tends to distribute the load incidental to such rearward anddownward movement of the trolleypole over a considerable area of thebase that is, the bearings in front and at the rear of the centralbearing are brought into action with substantially equal force.

The lever 3 is adapted to move from a substantially horizontal to avertical position by the action of the springs, and its further movementis prevented by suitable stops 35 on the sides of the revoluble section2.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is V 1. In a trolley-support, a fixed base-sectionhaving a central hub and an annular groove concentric with the hub,rollers in the groove, a revolving section bearing on the rollers andhaving a central hub telescoping with the former hub, rollers betweenthe hubs, a lever fulcrumed on the revolving section in front log of itsaxis, an anchor pivoted to the lever beneath its fulcrum. a secondanchor adjustably secured to the revolving head at the rear of its axis,and a spring connecting the anchors.

2. A trolley-support comprising a fixed base-section having a centralhub and upwardly-projecting annular flanges concentric with the hub toform a race, rollers mounted in the race, the flanges serving to holdthe rollers in an upright position, a revolving base-section having acentral hub telescoping with the former hub and having an annularbearing on its lower face resting upon the upper faces of the rollers, atrolley-supporting lover fulcrumed on the revolving base at one side ofits axis in a plane above the top face of the revolving section topermit the lever to be swung downwardly over said section to asubstantially horizontal position, and springs for elevating the trolleyend of the lever.

3. In combination with a base comprising a fixed section and arevolublesection, the fixed section having concentric annular flanges toform a race, and the revoluble section having a depending flangesurrounding the outer flange of the fixed section, rollers mounted an dseparate from the base-sections in the race,

a trolley-arm fulcrumed on the revoluble section, and springs forelevating the trolley end of the lever.

4:. In a trolley-support, a fixed base-section formed adjacent its edgewith a continuous raceway, a central hub formed with a socket, rollersfreely mounted in said raceway, a revolving section entirely overlyingsaid basesection, a hub partly projecting into the firstnamed hubwhereby its lower end is out of contact with the bottom of the socket,said rollers supporting said revolving section, a lever fulcrumed onsaid last-named section,

and springs for normally holding said lever in an elevated position.

In witness whereof I have hereunto set my hand this 17th day of October,1902.

PETER D. MILLOY. Witnesses:

H. P. DENISON, MILDRED M. NOTT.

